I agree paladin lines should be _additional_ to cleric lines, not reuse them; the classes are very different in outlook and role within the game-world.
Looking at a save game, I see Larian uses tags [Oath of devotion] and [Cleric of Shar]. Looks like there'll be dialogue lines for paladin and oath of X. Deities are already hard-coded with cleric.
Maybe paladins will get to choose gods, but kind of looks like that won't matter except in special circumstances (paladins of Tyr plot).
Something to bear in mind, with multi-classing there will be the cleric-paladin who gets access to both, but that's a unique appeal of such a multi-class. Actually makes multi-classing _very_ appealing, imo.
